third_party/blink/renderer/core/css/style_request.h

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
 * All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_REQUEST_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_REQUEST_H_

#include "third_party/blink/renderer/core/layout/custom_scrollbar.h"
#include "third_party/blink/renderer/core/scroll/scroll_types.h"
#include "third_party/blink/renderer/core/style/computed_style_constants.h"

namespace blink {

class ComputedStyle;

enum RuleMatchingBehavior { kMatchAllRules, kMatchAllRulesExcludingSMIL };

class StyleRequest {
  STACK_ALLOCATED();

 public:
  enum RequestType { kForRenderer, kForComputedStyle };

  StyleRequest() = default;

  bool IsPseudoStyleRequest() const { return pseudo_id != kPseudoIdNone; }

  const ComputedStyle* parent_override{nullptr};
  const ComputedStyle* layout_parent_override{nullptr};
  RuleMatchingBehavior matching_behavior{kMatchAllRules};

  PseudoId pseudo_id{kPseudoIdNone};
  RequestType type{kForRenderer};
  ScrollbarPart scrollbar_part{kNoPart};
  CustomScrollbar* scrollbar{nullptr};
  AtomicString pseudo_argument{g_null_atom};

  explicit StyleRequest(const ComputedStyle* parent_override)
      : parent_override(parent_override),
        layout_parent_override(parent_override) {}

  StyleRequest(PseudoId pseudo_id, const ComputedStyle* parent_override)
      : parent_override(parent_override),
        layout_parent_override(parent_override),
        pseudo_id(pseudo_id) {}

  StyleRequest(PseudoId pseudo_id,
               CustomScrollbar* scrollbar,
               ScrollbarPart scrollbar_part,
               const ComputedStyle* parent_override)
      : parent_override(parent_override),
        layout_parent_override(parent_override),
        pseudo_id(pseudo_id),
        scrollbar_part(scrollbar_part),
        scrollbar(scrollbar) {}

  StyleRequest(PseudoId pseudo_id, RequestType request_type)
      : pseudo_id(pseudo_id),
        type(request_type),
        scrollbar_part(kNoPart),
        scrollbar(nullptr),
        pseudo_argument(g_null_atom) {}
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_REQUEST_H_